Amanda Knox is back home in Seattle after her four years in an Italian prison, and a scholar from New York University waxes eloquent for CNN: "There is something about pretty white girls, bloody knives and the slightest whiff of sex that gets the international news machine humming like nothing else." Gee, who knew? Apparently, the Knox saga has caused some in the media to go through one of their periodic bouts of pretend intrspection: